A new precoded partial transit sequence method using the discrete cosine transform for peak-to-average power ratio reduction in an orthogonal frequency division multiplexing system

ABSTRACT: Orthogonal frequency division multiplexing (OFDM) is a well-known transmission technique that is adopted in a wide range of standards these days mainly because of its high data bit rate and spectral efficiency. However, OFDM has one major problem called the peak-to-average power ratio (PAPR). This paper will introduce a new method that uses the discrete cosine transform to enhance the PAPR reduction over that achieved in the partial transmit sequence (PTS) approach. The maximum achieved improvement of PAPR reduction compared to the conventional PTS approach is 257% with only 4 iterations and the maximum PAPR reduction achieved in the simulation is 5.7 dB.